Cook onion, green bell pepper, and ground chuck in a large, ovenproof skillet over medium heat until meat is browned, stirring to crumble. Drain well; set aside. Wipe drippings from skillet with a paper towel. Return meat mixture to skillet; add corn and next 9 ingredients, stirring well. Bring to a boil; cover, reduce heat to medium-low, and cook 10 minutes, stirring occasionally. Remove from heat; set aside.
Combine flour and next 3 ingredients in a bowl. Combine buttermilk and egg white; add to dry ingredients, stirring just until moistened. Spoon evenly over meat mixture. Bake at 400° for 13 minutes or until wooden pick inserted in center of corn bread comes out clean.